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Marathon Calendar Ontario 2025-2026

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Explore the best marathons in Ontario for 2025-2026! Our updated list features 15 exciting races across the region. Find your next race in Ontario below and join the running community at these great events!

August 2025
Aug
9
Saturday

Falling Water Trail Marathon

Trail Run 21 km 42 km
September 2025
Sep
7
Sunday

Georgina Marathon

5 km 10 km 21 km 42 km
Sep
13-14
Sa - Su

Tobermory Trail Race

Trail Run 5 km 7 km 21 km 42 km
Sep
20
Saturday

That Dam Hill

5 km 21 km ... 12 hr 24 hr
October 2025
Oct
5
Sunday

Muskoka Marathon

5 km 10 km 21 km 42 km
Oct
5
Sunday

The County Marathon

5 km 21 km 42 km
Oct
12
Sunday

Fall Colours Run

3 km 5 km ... 21 km 42 km
Oct
18-19
Sa - Su

Toronto Waterfront Marathon

5 km 21 km 42 km
Oct
26
Sunday

Niagara Falls Marathon

5 km 10 km 21 km 42 km
November 2025
Nov
1
Saturday

Hamilton Marathon Road2Hope

5 km 10 km 21 km 42 km
February 2026
Feb
15
Sunday

Embrace Winter Run

3 km 5 km ... 21 km 42 km
May 2026
May
3
Sunday

Georgina Spring Fling

5 km 10 km 21 km 42 km
May
3
Sunday

Toronto Marathon

5 km 10 km 21 km 42 km
May
23-24
Sa - Su

Tamarack Ottawa Race Weekend

5 km 10 km 21 km 42 km
August 2026
Aug
9
Sunday

The ENDURrun

Trail Run 10 km 15 km ... 30 km 42 km
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